A hectic January transfer window closed on Wednesday night – our writers look at all the 20 Premier League clubs and how their business unfoldedA hectic transfer window closed on Wednesday night – amid seven Premier League games – with several clubs able to conclude deals on deadline day. Premier League clubs were responsible for seven out of the 10 most expensive transfers of the window with the £75m Liverpool paid Southampton for Virgil van Dijk the costliest for an English club. Amid all the outgoings, there was also money coming into the Premier League with Barcelona paying Liverpool £106m (£142m including add-ons) for Philippe Coutinho. That was the most expensive of all transfers in the January window.As always, some clubs were happie...